Add API interfaces to documentation

[vsoch]

Rest framework has several nice interfaces that we should add to documentation - I'm thinking an interfaces page that will share content with #11.

[ad-m]

DRF-YASG is pretty useful to provide Swagger 2.0: https://github.com/axnsan12/drf-yasg
Swagger 2.0 allows to use API documentation UI like Swagger or ReDoc. Docker Engine API use ReDoc for documentation: https://docs.docker.com/engine/api/v1.40/#operation/ContainerCreate

[vsoch]

Thanks @ad-m - there currently already is a nice interface (and I mostly need to take screenshots of it) and I've used those modules on other projects. I'm going to label as an enhancement and wait for more general/community feedback asking for swagger to decide if it's worth implementing